Elastic Card Snap-Fit Sealing for Diagnostic Fluid Sample Leakage

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Solution Overview

Problem

Existing rapid diagnostic devices for fluid sample collection and detection, such as those for drug testing, face challenges with complex operation and inefficiency, particularly in sealing mechanisms, which hinder convenient and timely sample collection and testing.

Innovation Solution

A detection device featuring a fluid sample collecting chamber with a cover body that uses elastic cards and a buckle structure for easy fitting and secure sealing, along with a guide structure for accurate alignment, ensuring easy closure but difficult separation to prevent leakage and facilitate sample collection and testing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a threaded seal structure is used to close the collecting chamber, then the sealing effect is improved, but the operation complexity increases and efficiency decreases

Engineering Contradiction:

Improvesealing effectVSAvoidoperational convenience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent inverts the traditional sealing approach by using a snap-fit mechanism where the elastic card passes through the opening and engages with the outer wall, rather than threading the cover body. This inversion simplifies the operation from rotational threading to a single insertion motion while maintaining reliable sealing through the elastic engagement of the card with the wall.

Inventive Principle:

Principle #13The other way round (Inversion)

Solution Approach 2:

The patent replaces the complex mechanical threading system with a simpler elastic engagement system. The threaded connection is substituted by an elastic card that uses elastic deformation to create a secure fit, eliminating the need for rotational motion and multiple engagement points while achieving equivalent or superior sealing reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Manufacturing precision

If a raised thin sheet structure is arranged on the cover body to limit position, then the positioning accuracy is improved, but the manufacturing difficulty increases

Engineering Contradiction:

Improvepositioning accuracyVSAvoidmold production difficulty

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent uses an elastic card (a flexible thin film structure) to achieve positioning and sealing functions. The elastic card can be easily molded into the cover body using standard injection molding techniques, avoiding the complexity of creating raised thin sheet structures. The flexibility of the card allows it to deform during insertion and then maintain precise positioning when engaged.

Inventive Principle:

Principle #30Flexible shells and thin films

3Ease of operation

If the cover body is designed to be easily separated from the collecting chamber, then the operational convenience is improved, but the sealing reliability deteriorates

Engineering Contradiction:

Improveease of separationVSAvoidsealing reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent employs dynamic characteristics through the elastic card, which can deform elastically during the separation process. The card's elasticity allows for easy removal by simply pulling the cover body away, while the same elastic property ensures reliable sealing when the cover is attached. The dynamic nature of the elastic deformation provides both easy operation and reliable sealing without contradiction.

Inventive Principle:

Principle #15Dynamics

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The device allows for simple and efficient sample collection and testing, reducing the risk of leakage and improving operational convenience, while maintaining secure sealing to ensure accurate results.

Implementation Method 1

the cover body includes an elastic card used to engage with the opening of the collecting chamber, when the cover body closes the opening of the collecting chamber, the elastic card engages with the outer wall of the opening of the collecting chamber

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS11808672B2Detection device

Publication Date: 2023.11.07 ZHEJIANG ORIENT GENE BIOTECH CO LTD

AI summary

The invention provides a detection device, comprising a fluid sample collecting chamber, the collecting chamber including an opening, a testing element is arranged in the collecting chamber, and the testing element is used to test the presence of the analyzed substance in the fluid sample; the detection device further comprises a cover body used to close the opening of the collecting chamber; wherein the cover body includes an elastic card used to engage the opening of the collecting chamber, when the cover body closes the opening of the collecting chamber, the elastic card engages the outer wall of the opening of the collecting chamber, thereby fixing the cover body on the collecting chamber. The cover body of the invention is buckled with the collecting chamber, an elastic card and a buckle structure are arranged to facilitate fastening between the cover body and the bottle body, but make it difficult to separate them apart; this can avoid leakage of a sample inside the collecting chamber; a guide structure is arranged in the cover body, so that a closing area is formed when the opening of the collecting chamber is not deliberately aligned with the elastic card in the cover body during using, the closing between the cover body and the collecting chamber can be easily achieved, thereby improving the testing efficiency.